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r8000
2006 Oct 21
0
CentOS 3 - I/O performance with Promise HW RAID
(Suggestions for other forums in which to post this question are welcome.)
We have CentOS 3.6 x86_64 running on a server with dual 2.2GHz
Opterons and a Promise UltraTrak RM8000 connected via an Adaptec SCSI
card. We are seeing what seems to be gradual I/O performance
degradation over time; it seems to be OK for up to about 90 days, but
not long after that both CPUs end up continuously spending 50-99% of
their time in "iowait" state when reading/writing the RAID...